Engine filter



Sept- 1, 1953 J. c. sLoNNEGER 2,650,712

ENGINE FILTER Original Filed March, 14, 1946 2 Sheets-Sheet l Il l Il'Il l' I| 'lo l|\ 5S ED N E v N a n: l: 'E a i Q N v- Hlm /E am *i E 4 @f/f INVENTOR.

Patented Sept. 1, 1953 ENGINE FILTER John C. Slonneger, Dallas, Tex.,assigner to The Continental Supply Company, Dallas, Tex., a corporationof Delaware Application May 1, 1948-, Serial N0. 24,607, which is adivision of application Serial No. 654,427, March 14, 1946. Divided andthis application November 10, 1949, Serial No. 126,540

1 claim. 1

This invention relates to new and useful improvements in engine oilpumps and filters.

One object of the invention is to provide a pump and iilter or screenarrangement, whereby the screen is readily accessible from the outsideof the crankcase and easily removed from the pump and the crankcasethrough an opening in one of the case walls.

Another object of the invention is to provide a screen arrangementwhereby the screen is attached to a cover plate and is detachablyconnected to the pump, so that when said plate is removed it detachesthe screen from the pump and removal of the plate also removes thescreen from the crankcase.

Still another object of the invention is to provide a detachable, yetliquid tight connection, between the screen and the pump.

A construction designed to carry out the invention will be hereinafterdescribed together with other features of the invention.

The invention will be more readily understood from a reading of thefollowing specication and by reference to the accompanying drawings,wherein an example of the invention is shown, and wherein:

Fig. 1 is a partial, longitudinal sectional view of an engine equippedwith a pump and screen constructed in accordance with the invention,

Fig. 2 is a perspective view, partly in elevation and partly in section,showing a lubricating unit constructed in accordance with the invention,and

Fig. 3 is a longitudinal sectional view of the screen and componentparts.

This application is filed as a division of my copending application nledMay 1, 1948, Serial No. 24,607, which in turn was a division of my thenco-pending application, filed March 14, 1946, Serial No. 654,427, nowPatent Number 2,59),134.

In the drawings the numeral i3 designates, in general, the crankcase ofan internal combustion engine. The crankcase has a front wall II. Alubricating unit, indicated generally by the numeral I2, includes ablock I3 which is fastened or made stationary in the crankcase. Acamshaft It is journaled vertically in said block and drives a rotarypump I5, disposed horizontally and attached to the bottom of said block.The pump has an outlet boss I 6 and an oil discharge pipe II leads fromthe boss to the bottom of a vertical oil passage I8 in the block.

The pump has an inlet nipple I9 on its side facing the crankcase wall IIand having an annular fillet 2l) at its intersection with the pump. Acylindrical filter or screen 2l includes a perforated or foraminousshell 22, an inner end wall 23 and an outer end 24. The inner end wallhas a central opening 25, the outer annular edge 2S of which is beveled,so that when the nipple I3 is received in the opening, the beveled edgewill make a metal-to-metal contact with the fillet 23, whereby a liquidtight seal is had.

The front wall Il has a circular opening 2i which is surrounded by agasket 2B interposed between the outer face of the wall I I and theinner face of a rectangular cover plate 29, removably fastened on saidwall by stud bolts 3l). The cover plate has a boss 3| at the center ofits inner face and a stud bolt 32 has its outer end screwed into thisboss. The bolt extends through an aperture 33 in the outer end wall 24of the screen and has a nut 32 adapted to engage the inner side of saidwall. The aperture 33 is continued through a boss 35 on the outer sideof the wall 24. The boss 35 is directed toward the boss 3I and ispreferably of the same diameter so as to support a coil spring 36,having its ends bearing against the plate 29 and the end Wall 24 of thescreen. The spring being under compression holds the screen 2| on thenipple I9 and against the fillet 2li so as to form a liquid-tight joint.

Since the screen is immersed in the body of oil in the crankcase I il,it may be lled with filtering material if desired; however theperforations in the wall 22 may be of such size as to nlter the oilpassing therethrough. By reason of the spring 36, the screen isyieldably mounted on the pump and slidably mounted on the bolt 32. Thebolt 32 being secured to cover plate 29 and the screen being supportedby said bolt, it is obvious that when said plate is removed and pulledoutwardly, the screen will be withdrawn from the pump i5 through theopening 2. The screen is readily replaced. When the screen is replacedon the nipple I9 and the cover plate is fastened in place, there may besome slack, but the spring 33 will force the beveled edge 26 of end wall2li against` the nllet 20 and may itself be further compressed when thebolts 30 are tightened.

The foregoing description of the invention is explanatory thereof andvarious changes in the size, shape and materials, as well as in thedetails of the illustrated construction may be made, within the scope ofthe appended claim, without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

A lubricating oil screen for use in an engine crankcase on the intake ofan engine oil pump having a short intake nipple directed toward one 3wall of the crankcase, said oil screen including an imperforate coverplate adapted to be secured to the crankcase Wall, a bolt immovablysecured to and rigidly extending from the plate, an elonn gate unitaryforamnous screen having one end slidably mounted on the bolt, retainingmeans on the bolt Within the screen limiting longitudinal movement ofthe screen on the bolt away from the plate, a coiled spring between thescreen and the plate constantly urging the screen from the plate, thescreen having at its opposite end a support adapted to engage the intakenipple, and axially alined bosses on the cover plate and the screensurrounding the bolt, the spring encompassing said bosses.

JOHN C. SLONNEGER.

Name Date Davenport Mar. 24, 1925 Number Number Number Name Date GregoryJan. 4, 1927 Fisher May 20, 1930 Gardner et al Sept. 20, 1932 AldhamApr. 14, 1932 Waugh Sept. 8, 1942 Williams Dec. 8, 1942 Smith May 4,1943 Worthington May 4, 1943 Mieras Mar. 27, 1945 FOREIGN PATENTSCountry Date Great Britain Feb. 22, 1934 Great Britain Jan. 9, 1940Germany Sept. 16, 1896

